I have unfortunately never been there what is the 'escape' route from there like? Is it covered or concealed?
In view of about a dozen men on the overpass (south of the knoll), another man working in the Railroad switching station behind the Grass Knoll fence (west of the knoll), and some janitors who were to the north of the knoll. East of the knoll was of course, Elm Street with all the spectators. An assassin stationed there literally had nowhere to go, which is why some conspiracy theorists suggest he climbed into the trunk of his own car and hid there!
Lee Bowers worked in the switching station behind the knoll and had an excellent overview of the entire area:
http://jfkassassination.net/russ/testimony/bowers.htm
== quote ==
Mr. BALL - Did you see anyone standing on the triple underpass?
Mr. BOWERS - On the triple underpass, there were two policemen. One facing each direction, both east and west. There was one railroad employee, a signal man there with the Union Terminal Co., and two welders that worked for the Fort Worth Welding firm, and there was also a laborer's assistant furnished by the railroad to these welders.
Mr. BALL - You saw those before the President came by, you saw those people?
Mr. BOWERS - Yes; they were there before and after.
Mr. BALL - And were they standing on the triple underpass?
Mr. BOWERS - Yes; they were standing on top of it facing towards Houston Street, all except, of course, the one policeman on the west side.
Mr. BALL - Did you see any other people up on this high ground?
Mr. BOWERS -
There were one or two people in the area. Not in this same vicinity. One of them was a parking lot attendant that operates a parking lot there. One or two.
Each had uniforms similar to those custodians at the courthouse. But they were some distance back, just a slight distance back.
== unquote ==
Interestingly, in the movie JFK by Oliver Stone, Stone only quotes the highlighted portion of Bowers testimony, then cuts to a staged scene showing policemen in uniform - because by then the colorized Moorman photo had become popular, and it supposedly showed a policeman (called "Badgeman") firing a rifle at the motorcade.
Buddy Walthers was familiar with the area and ran to the knoll area after the shooting (he was around the corner on Main at the time of the assassination, and most likely ran to the knoll because everyone else was).
Here's his testimony:
http://jfkassassination.net/russ/testimony/walthers.htm
== quote ==
Mr. LIEBELER. Also, actually, if you were standing down here in front of this building on Main Street at the time the shots were fired, I suppose you could have seen down there to this railroad track trestle that goes over the underpass did you have occasion to look down there at any time?
Mr. WALTHERS. No; it never even entered my mind, and knowing how this thing is arranged and I have chased a couple of escapees across the thing before, and knowing what was over there, the thought that anyone was shooting from back in here I've heard some people say he was behind the fence, and I'm telling you, it just can't be, because it's a wide open river bottom area as far as you can go.
Mr. LIEBELER. It's a river bottom?
Mr. WALTHERS. Yes; and the thought that anyone would be shooting off of there would almost be an impossible thing--- there's no place for him to go---there's nothing.
== unquote ==
Hank